Patents Represented by Law Firm Connelly & Hute
  • Water-soluble azo dyestuffs, processes for their preparation and their use
    Patent number: 5821347
    Abstract: Dyestuffs corresponding to the general formula ##STR1## are described in which the variables have the meaning given in the specification. These dyestuffs have fiber-reactive properties and dye materials containing hydroxy and/or carboxamide groups, in particular fiber materials, such as wool, synthetic polyamide fibers and, in particular, cellulose fibers, such as cotton, in deep shades with good fastness properties.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: October 13, 1998
    Assignee: Dy Star Textil farben Gmbh & Co. Deutschland KG
    Inventor: Jorg Dannheim